We will launch the London 0MQ User Group with Pieter Hintjens talking about the mindboggling awesomeness of Zero. Pieter, the author of the forthcoming O'Reilly book on 0MQ and one of the founders of the project, will explain the basics of this connectivity library: what problems it solves and how it works. As a use case he'll take the software built for Obama's re-election campaign, which could "constantly query thousands of nodes for near real-time statistics and feed them right back into the alerting and monitoring system".